Covering for electric wires



(No Model.)

D. BROOKS, Jr. COVERING FOR ELECTRIC WIRES.

No. 437,913. Patented Oct. 7, 1890.

WITNESSES:

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UNITED STATES PATENT OFFICE.

DAVID BROOKS, J R, OE PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THEELECTRIC CABLE CONSTRUCTION AND MAINTENANCE COMPANY, OF

PENNSYLVANIA.

COVERING FOR ELECTRIC WIRES.

SPECIFICATION forming part of Letters Patent No. 437,913, dated October7, 1890.

Application filed November 7,1889. Serial No. 329,564. (No specimens.)

To all whom it may concern;

Be it known that 1, DAVID BROOKS, Jr., a citizen of the United States,residing in the city and county of Philadelphia, State of Pennsylvania,have invented a new and use-.

ful Improvement in Protective Coverings for Electric ires and Cables,which improvement is fully set forth in the following specification andaccompanying drawings.

My invention relates to improvements in coverings for electric cables;and it consists in providing the wires with a covering composed of adouble layer of tin-foil having between them an adhesive oil, theadjacent edges of each of the layers overlapping.

Figure 1 represents a side elevation of an electric cable covered inaccordance with my invention, the layers constituting the covering beingpartly unwrapped. Fig. 2 repre- 2o sents an end sectional view thereof.

Similar letters of reference indicate corresponding parts in the twofigures.

Referring to the drawings, A designates a bunch of insulated wires,which maybe bound together by braid or tape, so as to prevent separationof the same. The cable as produced is now saturated with a molten orliquid insulating compound and then wrapped with tin-foil or thinmetallic tape or ribbon B,

0 having its adjacent edges overlapping, after which the wrapping iscoated with a hot or liquid compound of an adhesive naturesuch as rosinand rosin-oil or asphaltum and oil, &c-.-of such character that whilepre- 3 5 venting the separation or parting of the layers will permitthem to move or slide upon each other, and a second wrapping C oftinfoil or tin metallic tape or ribbon is wound over the first layer ina similar manner to the first and pressed so that the two layers adhere.

A covering D of braid or tape of fibrous ma terial is then placed overand around the tinfoil, the material being also saturated in a molten orliquid adhesive compound.

Around the braid or material is wound or 5 wrapped a second doublelayerE F of tin-foil or thin metallic tape or ribbon, after which braidor tape G of fibrous material is wrapped or wound around the layers E Fand the surface is painted or otherwise coated with or the whole isdipped in a hot molten or liquid compoundsuch as asphaltum and oil-theresult being a cable havlng a protective covering of a superior order.It will be seen that as thus covered the cable may be bent in shortcurves, and while the inner layer may break the outer layer, moving uponitself and the inner layer, will preserve the joints with out breakingor opening the same.

Having thus described my invention, what 66 I claim as new, and desireto secure by Letters Patent, is-

1. A cable having a coating with a double layer of tin-foil and anadhesive oil or substance between the said layers permitting the layersto move one on the other without separating or breaking joints,substantially as described.

2. A cable having a covering of a double layer of tin-foil with anadhesive oil between 70 the same, each of the said layers havingoverlapping adjacent edges and the adhesive oil permitting a slidingmovement of the layers on each other without a separation, said partsbeing combined substantially as described.

DAVID BROOKS, JR. WVitnesses:

JOHN A. WIEDERSHEIM, JAMES F. KELLY.

